Admixture according to the functions are divided into several categories?
( 1) to ameliorate fluid property of concrete admixture, including a variety of superplasticizer, pumping agent and air entraining agent;
( 2) adjusting the setting time of concrete, hardening properties of additives, including retarder, early strength agent and accelerator; ( 3) to improve the durability of concrete admixture, including air entraining agent, waterproofing agent, rust agent;
( 4) to improve the performance of concrete admixture, including expansive agent, antifreeze agent, coloring agent.
In the concrete admixture standard defines what breed admixture?
Concrete admixtures standard defines 27 kinds of admixtures: ordinary water reducer, early strength agent, retarder, coagulant, air-entraining agent, water-reducing agent, retarding superplasticizer, early strength water-reducing agent, water reducing retarder, air-entraining water-reducing agent, waterproofing agent, antirust agent, filling agent, expansion agent, antifreeze agent, coloring agent, accelerator, pumping agent, water retention agent, flocculating agent, thickening agent, shrinkage-reducing agent, retarder, slag, silica fume, fly ash, granulated zeolite.